IndexOutOfRangeException when changing VRP Instances

[pfleck]

A IndexOutOfRangeException occurs when loading the first Augerat instance.

The exception occurs when the "Genetic Algorithm - VRP" sample or the first Taillard instance was loaded.

[pfleck]

r10860:

• Set BestKnownQuality and BestKnownSolution to null before setting the new ProblemInstance to avoid evaluation of the new instance with the old solution.

[pfleck]

r10861:

• Set the Solution in the VRPProblemInstanceView to null when content is changing and set the Solution on the new ActiveView to avoid repainting the new ProblemInstance with the old Solution.

[abeham]

ok

[abeham]

r10929: merged r10860, r10861 to stable